Rapid start-up process of oily sewage biochemical treatment system in oil field
A treatment system and oilfield technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problems of high dissolved oil content in emulsified oil, slow microbial growth rate, high treatment cost, etc. , to achieve strong impact resistance, enhanced adhesion, and high biological activity
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example 1
[0049] The test adopts two-stage contact oxidation mode, the volume of each biochemical tank is 40L, and the designed treatment capacity is 45L / h. The combined fiber hydrophilic filler is used. The test temperature is 30°C and the pH value is 6.5. The test sewage is oilfield sewage with an oil content of 30mg / L. Sulfide 15mg / L, total salinity 16699 mg / L, influent COD: 350mg / L, BOD: 200mg / L.
[0050] Start the system in strict accordance with the "Rapid film-hanging start-up process for oily sewage biochemical treatment system in oilfields". Nine days after the system was started, the system's oil removal efficiency reached 90%, the COD removal rate reached 80%, and the sulfide removal rate reached 100%. After the fifteenth day, the oil removal efficiency of the system reached over 98%, the COD removal rate reached 80%, and the sulfide removal rate reached 100%. The biofilm has high activity and high treatment efficiency, which achieves the purpose of quick start-up of biochemi...
example 2
[0052] Field application of a sewage treatment station in an oil field. Two-stage contact oxidation mode is adopted, and the volume of each biochemical pool is 200m 3 , design capacity 25 m 3 / h, using combined fiber hydrophilic filler, the temperature of oilfield sewage is 32°C, the test sewage is oily 42mg / L, sulfide 20mg / L, total salinity 25965mg / L, influent COD: 400mg / L, BOD : 200mg / L.
[0053] Start the system according to the "Rapid film-hanging start-up process for oily sewage biochemical treatment system in oilfields". Ten days after the system was started, the oil removal efficiency of the system reached 85%, the COD removal rate reached 75%, and the sulfide removal rate reached 100%. After the fifteenth day, the oil removal efficiency of the system reached over 98%, the COD removal rate reached 80%, and the sulfide removal rate reached 100%. The membrane activity is high, the treatment efficiency is high, and the oil removal effect is good, which achieves the purp...
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